Experimental investigation of effects of ship propulsion shafting alignment on shafting whirling and bearing vibrations

Lei, Junsong; Zhou, Ruiping; Chen, Hao; Gao, Yakun; Lai, Guojun

doi:10.1007/s00773-021-00822-0

Cited by 15 publications

(2 citation statements)

References 17 publications

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“…The experimental results showed that adjusting the shafting alignment could significantly decrease the vortex and bearing vibration occurring in the shafting system. Moreover, the reduction of bearing vibration in the horizontal direction was observed to be more effective compared to the vertical direction [8]. Zhang et al proposed a floating raft system including the floating raft, air spring installation system, etc.…”

Section: Related Workmentioning

confidence: 99%

Ship shafting alignment technology and hull deformation based on improved genetic algorithm and shipbed calibration

Zhang

2024

J. vibroeng.

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As science and technology develop in recent years, the center of ship shafting has received high attention from the ship industry. The traditional ship shafting calibration mostly focuses on the issue that hull deformation cannot be accurately estimated. The ship is floating after entering the water, and this method is not conducive to the long-term stable operation of the ship shafting. To solve the above problems, the study establishes the optimization model of ship axis alignment based on slide alignment and finite element method. This model can be optimized by adopting the non-dominant sequencing genetic algorithm improved by elite strategy. The study verified the performance of the optimization model of ship axis alignment. The results showed that the adaptive value, super-volume value, and inverse generation distance of the improved genetic algorithm were 74.57, 0.38, and 0.03, respectively. In the application of a ship, the intermediate bearing position could be adjusted by the ship shafting optimization model based on the improved non-dominant sorting genetic algorithm. As a result, the shaft reaction under the ballast condition was reduced by 24019 N than before, making the bearing load of the ship shafting more uniform. To sum up, the proposed optimal model is robust, which can effectively reduce the impact of hull deformation, improve the optimal effect of ship shafting alignment and ensure the safe navigation of the ship.

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Section: Related Workmentioning

confidence: 99%

Ship shafting alignment technology and hull deformation based on improved genetic algorithm and shipbed calibration

Zhang

2024

J. vibroeng.

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“…Modern transport ships are becoming increasingly high-speed and large-scale ships, requiring the installation of propellers and propulsion shafts with larger diameters to generate greater propulsion, which greatly increases the load on bearings, especially on the after stern tube bearing (STB). Poor shafting alignment of the ship propulsion system will cause rapid wear or even damage to the after STB and may also exacerbate ship hull vibration, seriously affecting the safety and comfort of the ship's operation [1][2][3][4]. Therefore, it is particularly essential to ensure good shafting alignment of the ship's propulsion system.…”

Section: Introductionmentioning

confidence: 99%

Study on the Methods of Measurement, Optimization and Forecast of Propulsion Shaft Bearing Load of Ships

Chen

et al. 2023

JMSE

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The qualit12y of shafting alignment is related to the reliability and safety of a ship’s operation, and bearing displacement adjustment (BDA) plays a key role in shafting alignment. To solve the problems encountered in ship shafting alignment in the actual construction, this study focused on the investigation of the shafting load measurement system based on the strain gauge method (SGM), used the optimization method based on quadratic programming (QP) to calculate the BDA and adopted algorithms based on the bearing load influence coefficients (BICs) to forecast the load after the adjustment. The experimental work, as well as the measurement, calculation and analysis of several real ships, indicated that the measurement, optimization and forecasting methods of the bearing load of the propulsion shafting of large ships in this study would be significant for guiding the actual construction work of ship shafting alignment.

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The Application of Modal Analysis for Dynamic Systems of Ship’s Shaft Lines

Kushner

2024

Lecture Notes in Mechanical Engineering

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Experimental investigation of effects of ship propulsion shafting alignment on shafting whirling and bearing vibrations

Cited by 15 publications

References 17 publications

Ship shafting alignment technology and hull deformation based on improved genetic algorithm and shipbed calibration

Ship shafting alignment technology and hull deformation based on improved genetic algorithm and shipbed calibration

Study on the Methods of Measurement, Optimization and Forecast of Propulsion Shaft Bearing Load of Ships

The Application of Modal Analysis for Dynamic Systems of Ship’s Shaft Lines

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